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Finding the Fourth Proportional to 66,420.27, 91,658.79 and 36,205.85

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Solution

The fourth proportional to 66,420.27, 91,658.79 and 36,205.85 is: 49,963.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,420.27 : 91,658.79 = 36,205.85 : x
  2. Step 2: Convert to fraction form
    66,420.27/91,658.79 = 36,205.85/x
  3. Step 3: Cross multiply
    66,420.27x = 91,658.79 × 36,205.85
  4. Step 4: Simplify right side
    66,420.27x = 3,318,584,631.07
  5. Step 5: Solve for x
    x = 3,318,584,631.07/66,420.27
  6. Step 6: Final answer
    x = 49,963.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.